I’ve seen this feature on a few sites, and its just beginning to get wider us (I like it very much) but I have no experience with it. I suggest you go to the plugin maker since they usually have a forum.

You can download this free program (winmerge.org) that compares any 2 files/or directories line by line., Copy the firebug html source (or view source) for the page where it is working into one window, and paste the code for the one not working in the other window, and it will instantly show you side by side color coded views of the differences, so you can easily spot what needs to be modified. http://download.cnet.com/WinMerge/3000-2216_4-10598281.html

I implemented the infinite scroll script on my website: http://inoplugs.com/blog/ without using the plugin but I used the standalone jquery version (because of performance reasons, etc.). Add following code to functions.php (at the very bottom)